Nautilus!

What would you reply to an eccentric and elderly gentleman who proposed that you take part in an expedition to the famous "Mysterious Island" from Jules Verne's novel of the same name? And what does Cyrus Smith, the gentleman in question, intend to find in what was Captain Nemo's inaccessible refuge? Needless to say, Martin Mystère doesn't miss such a tempting opportunity and accompanies the old explorer to the island. Meanwhile, in their secret base, the Men in Black weave their plots...